EIB Alarm Central Unit, surface-
mounted
75730010
Technical
Documentation
© Gebr.Berker 2005
Version: 18.08.2005
Page: 35 / 81
(Subject to prior change)
75730010.doc
Part 9
"Armed" state:
You can only arm an area as soon as all detectors assigned to such area are not active, i. e. do not trip, and if there
is no fault. The display units will indicate this by reading the "ready for arming" message. In systems without display
units, this state can be indicated through the "ready for arming" object ("0" = not ready for arming/ "1" = ready for
arming).
armed
disarmed
All
detector contacts
closed?
no
yes
arming
S
U
Once an arming area has been activated, its assigned safeguarding safeguarding areas will be kept under surveil-
lance. In such case, intrusion and attack signals will raise alarm in this arming area. Depending on the application
and the distribution of the safeguarding areas (configuration), you can distinguish between:
•
internally armed: Only the outer shell of a building will be kept under surveillance. The user is in the inside and will
not raise an alarm unless he/she interferes into the outer shell. Although motion detectors installed in the inside
will recognize his/her movements, no alarm will be raised. Sabotage signals from the inside will cause an alarm
central unit fault signal.
and
•
externally armed: All internal and external detectors will be monitored. If any of the detectors or even a sabotage
detector responds alarm will be raised.
If an area is not ready for arming you can read "not ready" in the displays, the value of the "ready for arming" object
being "0". Before you can do arming in this case, you must recognize and eliminate the cause such as an open de-
tector. The display units will indicate open detectors.
You can parameterize an arming delay time per arming area. This time may become necessary if the arming device
is located within an area to be safeguarded, and, in addition, if such area must be left before arming. The delay time
specifies the time after which the system will really be armed after an arming command (plan some time reserve).
Only after the delay time has elapsed, no detector (this also applies to the sabotage contact) must still be active, or
arming will not take place.
In this state, you cannot address and programme the alarm central unit via the bus. Nevertheless, if you try to do so such
access will raise an alarm in the armed areas. Access via the bus in this state will be recorded in the event log.
"Alarm" state:
If a detector within an armed safeguarding area responds the alarm system will change to the "alarm" state. The
alarm indicators - siren, flashlight, alarm transmission device, etc. - will be activated (in accordance with how they
have been programmed).
If you have parameterized detectors as "delayed" a "pre-alarm" per arming area can first be raised through the "pre-
alarm" object. The transition into the "alarm" state will then only follow after the corresponding alarm delay time,
which you can parameterize per arming area, has elapsed.
If another detector trips after an alarm has already been raised (alarm indicators activated for a certain period have al-
ready been switched back off) a subsequent alarm will follow. This will reactivate all alarm indicators parameterized to
a certain time period. A subsequent alarm will also directly trigger inputs parameterized as "delayed".
You can only deactivate an alarm through arming devices of the arming area (disarming) which have not been tam-
pered with or through the alarm reset option.
In this state, you cannot address and programme the alarm central unit via the bus. Nevertheless, if you try to do so
such access will raise a subsequent alarm in the armed areas after the alarm indicators have already ceased after
the first alarm. Bus access in this state will be saved in the event log.
Note: The following applies to all configurations: Once an alarm has been raised in an arming area, all the other
areas will not be ready for arming before the alarm is reset.
